.Header h1 {
  color: #7bc0fc;
  font-size: 40px;
  height: 100px;
  line-height: 100px;
  text-align: center;
  border: 3px solid #f5f5f5;
  width: 530px;
  margin:40px auto 20px;
}
.Header .input-box {
  display: flex;
  margin: 0 auto;
  align-items: center;
  width: 530px;
  box-shadow: inset 0px 0px 5px #ddd;
  padding: 10px;
}
.Header .todo-input {
  border: none;
  outline: none;
  height: 40px;
  line-height: 40px;
  padding: 0 20px;
  flex: 1;
  box-sizing: border-box;
  font-size: 18px;
}
.Header .icon-icon_nav_clost_line {
  display: block;
  color: #c9c9c9;
  font-size: 18px;
  width: 32px;
  height: 32px;
  line-height: 34px;
  text-align: center;
  cursor: pointer;
}
.Header ::placeholder {
  color: #ddd;
}
